sanderson



(No-Model.)

L. H. SANDERSON.

Lathe.

No. 238.971. Patented Mjarch'JSQlSSI'.

N. FETERS, PHOTO-UTHOGRAFHER. WASHINGTON. D. C.

u or a grinding-stone.

UNITED STATES PATENT OFFICE.

LUOIUS H. SANDERSO-N, OF NEWV YORK, N. Y.

SPECIFICATION forming part of Letters Patent No. 238,971, dated March15, 185.1,

Application filedDecember 6,1880. (No model.)

will enable others skilled in the art to which it appertains to make anduse the same, refer ence being had to the accompanying drawings, and toletters or figures of reference marked thereon, which form apart ofthisspecification.

This invention relates to that class of lathes' used by watch-makers andjewelers; and the improvement consists in a standard support ing a benchor bed, and provided with a vertical opening and side journal-bearin gsfor the driving-wheel and formed at the upper end with screw-threads.

My improvement also consists in the combination, with a driving-wheelarranged below the table, of a live spindle or arbor formed at one endwith a socket suitably-supported and provided with a speed-pully and acentering chuck or device.

Myimprovement also consists in a live spindle or arbor suitably mountedin journal-bearings, having at one end a socket to receive a centeringchuck or device and at the other end a polishing device.

My improvement also consists in the construction and arrangementof theparts,'as will be hereinafter more fully set forth and specificallyclaimed.

Figure 1 of the drawings is a perspective view of my improved turningand polishing lathe. Fig. 2 is a perspective View of the U- shapedjournal-bearing and live-spindle with its attachments. Fig. 3 is aperspective view of the spindle which receives an emery-wheel Fig. 4 isan enlarged detail view of the live-spindle and the sectionaljournal-box.

In the annexed drawings, forming a part of this specification, theletter A represents the base or platform, to which, at its forward end,is journaled the treadle orfoot-boardB. In the center of this base orplatform is erected or secured a vertical standard or post, 0, tosupport the bed or bench D of the lathe. This standard or post is formedwith side journalbearings a and a vertical slot, 1), for the axle of thedriving or fly wheel E, and the passage of the same, substantially asseen in Fig. 1 of 5 ceive a drawer, and the other end is formed with anextended slotted bed, F, for the tailstock and toolrest, and provisionis made for the adjustment of the same.

The letter H represents a U-shaped headstock, formed with branch armshaving bearings with removable caps d, for the ready adjustment anddetachment of the live-spindle with its attachments to or from thejournalbearings. This head-stock has formed therewith, by casting, ashank or stem, c, provided with male screw-threads to form theconnection through the bench with the standard.

The live-spindle I, having its journal-bearings in the arms of thehead-stock, is provided with aspeed-pulley, which is located upon thespindle at a point within the arms of the headstock and arranged overthedriving or fly-' wheel under the bench, so as to receive thedriving-belt from the same in a direct line.

The front or forward end of this live-spindle is formed with a socket ormade hollow a suitable distance, and is provided with a detachablecentering-stock to center and revolve the work to be operated upon; orthis end may be provided with a chuck for receiving and cen- 9o teringthe work, so that it may revolve true; and the other or opposite end ofthe spindle is tapered to a point, and on this end are adjusted andsecured the buffs or brushes K for polishing jewelry. On a direct linewith and 5 in rear of the buffs or brushes is attached a removable andadjustable curved guard, serving as a protector, which collects anyparticles that may fly oif from the wheel or buff when the same is inoperation.

The letter M represents a tool-rest capable of vertical, lateral, andhorizontal adjustment;

As before 60 and N indicates the tail-stock with the deadspindle capableot'the well-known adjustments.

A mandrel, 0, (see Fig. 3,) is used sometimes in lieu of thecentering-stock on the live-spindle whenever the machine is used forpolishing and grinding. Upon this mandrel, when inserted home in thelive-spindle, are adjusted. emery-wheels for grinding glass &c., andgrindstones for sharpeningjewelers tools.

The periphery of the driving'or fly wheel is grooved to receive a bandor belt which passes over the speed-pulley, substantially as shown inFig. 1 of the drawings.

It will be seen from the foregoing description that this machine isdesigned for turning and polishing, and is especially adapted forwatch-makers and jewelers.

The work to be turned is adjusted and centered by means of thecentering-spindles in the head and tail-stocks, and the tool-rest isproperly adjusted to the Work to facilitate the workman in turning thework to a given length or diameter. After the work is turned it isremoved from the. centering devices or means and transferred to theother end of the spindle for the buffs or brushes, where the article maybe highly polished.

The means that drive the lathe also operate the bufi's or brushes forpolishing.

I claim the right to vary the construction of the elements of noveltyWithout departing from the spirit of the invention.

What I claim as my invention, and desire to secure by Letters Patent,is-

1. The combination of a vertical slotted standard having sidejournal-arms, a drivingwheel journaled to the sidearms and workingwithin the slot of the standard, the platform attached to the base ofthe slotted standard,

screw-threads, substantially as and for the.

purposes hereinbefore stated.

3. In alathe, the U-shaped head-stock with the screw-threaded shank orstem, adapted to be attached to astandard or post, having at its upperend female screw-threads for the attachment of the male screw-threads onthe headstock, substantially as described.

4. In ajewelers lathe, a live-spindle having at one end a buii'er orpolishing means, and the other end formed with a socket to receive aremovable tool, substantially as described.

5. The watch-makers or jewelers lathe, consisting of the followingorganized instrumentalities, to wit: the slotted standard, the platformwith the treadle mechanism, the U- shaped head-stock, the live-spindlehaving at one end a polishing device and the other end form ed with asocket to receive interchangeable tools, and the driving-wheel with thedrivingbelt, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

LUGIUS H. SANDERSON.

Witnesses:

M. L. EASTERDAY, E. P. HoLMEs.

